declare_args() {
  # libc++ ABI version. Either 1 (default) or 2 (unstable).
  libcxx_abi_version = 1

  # libc++ inline ABI namespace. Defaults to __n, where n is the ABI version.
  libcxx_abi_namespace = ""

  # Whether to support libc++ opt-in debug mode via _LIBCPP_ENABLE_DEBUG_MODE.
  libcxx_enable_debug_mode = false
}
